# The Microchipping of Cats and Dogs (England) Regulations 2023, Regulation 5: Form of a microchip


Any microchip implanted in a cat or a dog must meet the following requirements—
(a) it must have a unique number which includes the manufacturer’s code;
(b) it must be compliant with ISO standard 11784:1996 of the International Standards Organisation’s standards for microchips;
(c) it must be compliant with ISO standard 11785:1996 of the International Standards Organisation’s standards for microchips apart from Annex A; and
(d) it must respond to a transponder which operates at 134.2 kilohertz and conforms with the FDXB protocol set out in ISO standards 11784:1996 and 11785:1996.

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Source: https://www.legislation.gov.uk/ukdsi/2023/9780348246063/regulation/5 (the official version)
Page: https://openlegislation.uk/draft-microchipping-of-cats-and-dogs-england-regulations-2023/regulation-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.